Advertisements
Advertisements
प्रश्न
Distinguish between Nonchordata and Chordata.
Advertisements
उत्तर
| Nonchordates | Chordates |
| 1. Notochord is absent in them | 1. Notochord is present in them at some of their developmental stage. |
| 2. Their central nervous system is solid and ventral | 2. Their central nervous system is hollow and dorsal. |
| 3. Heart, if present in them, is dorsal in position. | 3. Heart is always present and it is ventral in position. |
| 4. Their circulatory system is of open or closed type. | 4. Their circulatory system is of closed type. |
| 5. Respiratory pigment, the haemoglobin, if present, is dissolved in plasma of blood. | 5. Haemoglobin is present in their red blood cells or corpuscles. |
| 6. Pharyngeal gill slits are absent in them. | 6. Pharyngeal gill-slits are present in them. |
| 7. They contain anus at posterior end of body, so post-anal tail is not present. | 7. Their anus is not located at posterior tip of body, so contain a post-anal tail. |
संबंधित प्रश्न
What are the differences between amphibians and reptiles?
How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
Match the animals given under column A with their respective classification group given under column B
| Column A | Column B | ||
| 1 | Sponge | a | Amphibia |
| 2 | Snail | b | Reptilia |
| 3 | Butterfly | c | Echinodermata |
| 4 | Toad | d | Mollusca |
| 5 | Lizard | e | Arthropoda |
| 6 | Starfish | f | Porifera |
What do you mean by the term coelomate animals? Give two examples.
What are adaptations in fishes due to which they are aquatic?
Write short note on protochordates.
The animals (Kingdom Animalia) are mainly grouped under two categories
What are the group names of the following categories of animals?
Animals with feathers _________
Give any one difference between the following :
Flatworm and Roundworm
Given below is an animal followed by three terms or features. Underline the term which does not match with the animal.
Earthworm - Invertebrata, Annelida, Insecta
Write down a flow chart showing subdivisions of kingdom Animalia.
Give four important characters of mammals.
Write the name of oviparous mammal.
Give two examples of each of the following: Nemathelminthes
Give two examples of each of the following: Arthropoda
Fill in the blanks:
Bath sponge belongs to phylum ______.
Choose the correct answer: Protista is the link between
Choose the correct answer: Binomial Nomenclature was proposed by
Assertion (A): All vertebrates are chordates but all chordates are not vertebrate.
Reason (R): The members of subphylum vertebrata possess notochord, during the embryonic period, the notochord is replaced by a cartilaginous or bony vertebral column in adults.
In the light of the above statements, choose the correct answer from the options given below:
